Exterior wall structure of a refrigerated container

Abstract

The present invention aims to address the problems of the prior art, particularly to provide an exterior structure for a refrigerated container that is not made of metal, resin, etc., is easy to dispose of after the trial period, and has sufficient strength. [Solution] This problem is addressed by a refrigerated container exterior structure consisting of a container section and a pallet section, with paper as the main material. The container section consists of a bottom panel, front side panels, left and right side panels, rear side panels, and a top panel. The front side panel, left and right side panel, and rear side panel are fitted with a group of paper tubes consisting of multiple paper tubes, or a group of half-paper tubes consisting of multiple half-paper tubes obtained by cutting a paper tube in the extending direction, and This problem is solved by a refrigerated container exterior structure characterized by the fact that the corners between the front side panel, left and right side panel, and rear side panel are covered with end paper tubes.

Description

TECHNICAL FIELD

[0001] The present invention relates to an outer wall structure of a cold insulation container.

BACKGROUND ART

[0002] Conventionally, cold insulation containers, especially those used for long-distance transportation, have often been of relatively large sizes. This is to aim at the cost reduction effect brought by mass and large-volume transportation. Furthermore, a refrigeration apparatus for cooling the interior of such a large cold insulation container over a long period of time was often installed side by side. This further promoted the increase in size of cold insulation containers.

[0003] Such large cold insulation containers are inevitably transported by large ships, freight trains, and large trucks. It was difficult to operate large ships, freight trains, and large trucks frequently. In addition, such large cold insulation containers were in principle used by so-called carriers when they received requests from a large number of clients, mixed and loaded the luggage from these multiple clients, and carried out transportation. There was no cold insulation container available for transporting a small amount of contents from a single person over a long distance.

[0004] Large cold insulation containers are inevitably made of materials such as metal and resin, and these materials are difficult to process, mold, and assemble, and are also difficult to repair when damaged. On the other hand, from the perspective of environmental load, cold insulation containers made of metal, resin, etc. are not easy to dispose of after the end of their service life, and the disposal cost is also a non-negligible amount.

[0005] To transport contents over long distances, a container capable of keeping cold for a long period of time was required, but there was no conventional cold insulation container that had sufficient cold insulation performance on its own, and it was necessary to install the aforementioned refrigeration equipment and the like, which forced the use of electricity. Such cold insulation containers using electricity did not meet the current environmental requirements aiming at CO2-free status, and there was also a problem that electricity costs were required due to the use of electricity.

[0006] Furthermore, due to the difficulty of processing and the fact that the containers are intended to be mixed with other companies' products, it was difficult to imbue the exterior wall structure with the company's own unique aesthetics and design.

[0007] Thus, conventional refrigerated containers had many problems, and their operating costs were inevitably high. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2022-142430 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] Therefore, the present invention aims to address the aforementioned problems of the prior art, particularly by providing an exterior structure for a refrigerated container that is not made of metal, resin, etc., is easy to dispose of after the trial period, and has sufficient strength. [Means for solving the problem]

[0010] This problem concerns a refrigerated container exterior structure consisting of a container section and a pallet section, with paper as the main material. The container section consists of a bottom panel, front side panels, left and right side panels, rear side panels, and a top panel. The front side panel, left and right side panel, and rear side panel are fitted with a group of paper tubes consisting of multiple paper tubes, or a group of half-paper tubes consisting of multiple half-paper tubes obtained by cutting a paper tube in the extending direction, and This problem is solved by a refrigerated container exterior structure characterized by the fact that the corners between the front side panel, left and right side panel, and rear side panel are covered with end paper tubes.

[0011] Advantageously, the end tubes can be made up of larger tubes than the tubes that make up the group of half-tubes.

[0012] Furthermore, connecting mechanisms are provided between the front side panel and the left and right side panels, and between the top panel and the front side panel, allowing for the connection and disconnection of these panels, and the front side panel can be configured to be openable.

[0013] In another advanced version, a connecting mechanism is provided between the top panel and the front, left, right, and rear side panels, allowing these panels to be connected and disconnected, and the top panel can be configured to be openable.

[0014] Furthermore, the top panel and bottom panel are provided with band sections and corresponding connecting sections, and the front side panels, left and right side panels, and rear side panels are configured to be held in place by the tension of the bands stretched between the top panel and the bottom panel tubes. A connecting mechanism is provided between the front side panel, left and right side panels, and rear side panel, which allows for the connection and disconnection of these panels, and It is also possible to configure each panel to be detachable by disconnecting the connection between the band and the connecting part.

[0015] In yet another advanced form, there is a refrigerated container exterior structure consisting of a container section and a pallet section that use paper as the material for reporting, The container section consists of a bottom panel, front side panels, left and right side panels, rear side panels, and a top panel. The front side panel section, left and right side panel section, and rear side panel section are constructed primarily from paper tubes, and It is possible that the corners between the front side panel, left and right side panel, and rear side panel are covered by end paper tubes. [Brief explanation of the drawing]

[0016] [Figure 1]External view of the container exterior structure according to the present invention [Figure 2] Views of the container exterior structure according to the present invention seen from six directions, and A-A cross-sectional view [Figure 3] Exploded view of the container exterior structure according to the present invention [Figure 4] Diagram of the semi-paper tube material and paper material used for the exterior structure [Figure 5] An example of the structure for fixing and erecting the paper tube material on the paper material [Figure 6] Diagram of the internal structure of the semi-paper tube material [Figure 7] Diagram of an example in which a display portion is further provided on the container exterior structure according to the present invention [Figure 8] Diagram of a state where a cold insulation structure is housed in the container exterior structure according to the present invention [Figure 9] Diagram of another embodiment in a state where a cold insulation structure is housed in the outer layer structure [Figure 10] External view of another embodiment of the container exterior structure according to the present invention [Figure 11] Views of another embodiment of the container exterior structure according to the present invention seen from six directions [Figure 12] Exploded view of another embodiment of the container exterior structure according to the present invention [Figure 13] External view of another embodiment of the container exterior structure according to the present invention [Figure 14] Views of another embodiment of the container exterior structure according to the present invention seen from six directions [Figure 15] Exploded view of another embodiment of the container exterior structure according to the present invention [Figure 16] External view of another embodiment of the container exterior structure according to the present invention [Figure 17] Views of another embodiment of the container exterior structure according to the present invention seen from six directions [Figure 18] Exploded view of another embodiment of the container exterior structure according to the present invention [Figure 19] External view of another embodiment of the container exterior structure according to the present invention [Figure 20] Diagram of another embodiment of the container exterior structure according to the present invention [Figure 21]Diagram of another paper tube structure [Figure 22] Diagram of another embodiment of the container exterior structure according to the present invention [Figure 23] Diagram of another embodiment of the container exterior structure according to the present invention [Figure 24] Diagram of another embodiment of the container exterior structure according to the present invention [Modes for carrying out the invention]

[0017] The present invention will be described in detail below based on the embodiments shown in the accompanying drawings.

[0018] [Overall structure] Figures 1, 2, and 3 show external views of the refrigerated container exterior structure according to the present invention. The refrigerated container exterior structure according to the present invention is shown in perspective view in Figure 1, in six views and as an AA cross-sectional view in Figure 2, and as an exploded view in Figure 3.

[0019] [First embodiment of the exterior structure of a refrigerated container] As can be seen in Figures 1, 2, and 3, the refrigerated container exterior structure according to the present invention consists of a pallet section 200 and a container section 100. Both the pallet section 200 and the container section 100 are basically made entirely from paper material.

[0020] The pallet section 200, as can be seen particularly in Figure 3, consists of a bottom cross section 210, a support column section 220, and a top panel section 230. In the example in Figure 3, the bottom cross section 210 is formed from six elongated frame members that intersect each other. The frame members are formed in a roughly rectangular shape, and the corners are rounded to match the shape of the support column section 220. The frame members can be formed from paper material, particularly honeycomb board material.

[0021] The support columns 220 are formed from paper tube material. Paper tube material is a paper material component formed by winding layers of paper into a cylindrical shape. In forming the pallet section 200, multiple such paper tube materials are cut to predetermined lengths and used as support columns 220, erected and fixed at the intersections of each component of the bottom cross section 210. The support columns 220 can be fixed to the bottom cross section 210 by adhesive or other methods, or by a method using protrusions described later (Figure 5).

[0022] The top panel section 230 is placed on the support column section 220, which is erected on the bottom cross section 210 of the pallet section 200. The top panel section can also be made from honeycomb board material or the like. The support column section 220 and the top panel section 230 can be fixed together by adhesive or other methods, or by a method using protrusions as described later (Figure 5). In Figure 3, the bottom board member 130 of the container section 100 is shown placed on the top panel section 230 of the pallet section 200.

[0023] As can be seen in Figures 1, 2, and 3, the container section 100 consists of a bottom panel section 110, a top panel section 170, and front, rear, left, and right side panel sections 140, 150, and 160. All of these panel sections are mainly made of paper material and paper tube material.

[0024] As shown in Figure 3, the bottom panel portion 110 is formed by combining the top panel portion 230 of the pallet portion 200, meaning that the top panel portion 230 of the pallet portion 200 and the bottom panel portion 110 of the container portion 100 can be made from the same material. The bottom panel portion 110 is formed in a rectangular shape, and in this particular embodiment, it is formed in a substantially square shape. The corners of the bottom panel portion 110 are rounded, meaning that rounded corners are provided. The bottom panel portion 110 can be formed from a paper material such as honeycomb board material.

[0025] As can be seen in Figure 3, each of the four peripheral edges of the bottom panel section 110 is provided with multiple protrusions 120. These protrusions 120 are used for positioning when erecting the side panel sections 140, 150, and 160. These protrusions 120 can also be formed from paper material (Figure 5). The protrusions 120 can be formed in a semi-cylindrical shape to correspond to the shape of the semi-cylindrical tubes (described later) attached to the side panel sections 140, 150, and 160.

[0026] A bottom board member 130 is placed on top of the bottom panel portion 110. The bottom board member 130 can also be made from paper material, particularly honeycomb board material. The bottom board member 130 can be fixed to the bottom panel portion 110 by adhesive or the like.

[0027] The side panel sections 140, 150, and 160 erected on the four periphery edges of the bottom panel section 110 consist of a front side panel section 140, a rear panel section 150, a left side panel section, and a right side panel section 160. All of these side panel sections 140, 150, and 160 can be formed in a rectangular shape. The side panel sections 140, 150, and 160 can also be formed from paper material, such as honeycomb board material.

[0028] The front side panel section 140 consists of a panel section 141, a group of half-size paper tubes 142, an end-size large-diameter paper tube 143, a partial top panel section 144, and a partial side panel section 146.

[0029] The panel section 141 is formed from a flat paper material such as honeycomb board. In this embodiment, the panel section is formed in a substantially square shape.

[0030] A group of half-sized paper tubes 142 is attached to the panel section 141. The group of half-sized paper tubes 142 is formed by cutting paper tube material in half along its diameter, orienting them vertically, and arranging them parallel to each other near the center of the front panel, and attaching them to the front side panel section. The half-sized paper tubes of the group of half-sized paper tubes 142 extend from the top end to the bottom end of the panel section 141. Spaces where no paper tubes are attached are provided on both sides of the group of half-sized paper tubes on the panel section 141.

[0031] At the left and right ends of the panel section 141, larger diameter paper tubes than those forming the group of half-sized paper tubes 142 installed in the center are attached as end-size large-diameter paper tubes 143. The end-size large-diameter paper tubes 143 are formed to encircle the container section 100 around the corners over a range of approximately 270 degrees (cross-sectional view A in Figure 2). The aforementioned group of half-sized paper tubes 142 and these end-size large-diameter paper tubes 143 make it possible to significantly improve the strength of the front side panel section 140. Note that the paper tubes provided at the ends are not necessarily limited to large-diameter tubes; they may simply be provided as end-size paper tubes.

[0032] The front side panel section 140 further has a partial top panel section 144 (Figure 3). The partial top panel section 144, together with the top panel section 170 described later, is a component that forms the top surface of the container section 100. Although not shown in the figure, the lower surface of the partial top panel section 144 is provided with a number of protrusions, and through these protrusions, connection, positioning, and fixing can be performed between the partial top panel section 144 and the semi-circular paper tube group 142 of the panel section 141.

[0033] The front side panel section 140, which is provided on the front of the container section 100, further has a partial side panel section 146 (cross-sectional view A in Figure 2). The partial side panel sections 146 are provided at both the left and right ends of the panel section 141 of the front side panel section 140, and together with the left and right side panel sections 160, which will be described later, they are members that form the left and right sides of the container section 100. The partial side panel sections 146 and the panel section 141 can be fixed together by adhesive or the like. The partial side panel sections 146 are also made from a paper material such as honeycomb board.

[0034] The aforementioned end-sized paper tube 143 is configured to cover these partial side panel sections 146. In other words, the dimensions of the partial side panel 146 are determined in relation to the size of the end-sized paper tube 143. The end-sized paper tube 143 is provided to extend from the upper end to the lower end of the panel section 141 of the front side panel section 146 and the partial side panel section 146.

[0035] The front side panel section 140 is provided with a connecting mechanism 145 for connecting to the top panel section 170 and the side panel section 160, on the partial top panel section 144 and the partial side panel section 146. In this embodiment, three connecting mechanisms 145 are provided on each of the partial top panel 144 and the partial side panel 146, for a total of nine connecting mechanisms (Figure 3).

[0036] The area where the connecting mechanism 145 for the end large-diameter paper tube 143 is provided is notched so as not to obstruct the operation of the connecting mechanism 145.

[0037] The side panel sections 160 provided on the left and right sides of the container section 100, i.e., the left and right side panel sections 160, consist of a panel section 161 and a group of semi-circular paper tubes 162. The panel section 161 is again formed from a flat paper material such as honeycomb board. The group of semi-circular paper tubes 162 is attached to the panel section 161 in the same manner as described above, but in the left and right side panel sections, it is attached to the panel section 161 slightly forward of the center (towards the front side panel section 140). Three connecting mechanisms 163 are attached to the ends of the left and right side panel sections 160 on the side facing the front side panel section 140.

[0038] The rear side panel section 150, provided on the rear surface of the container section 100, is formed from a panel section 151, a group of half-size paper tubes 152, and end-size large-diameter paper tubes 153. The group of half-size paper tubes 152 is attached to the panel section 151 in the same manner as described above. In the rear side panel section 150, similar to the front side panel section 140, the group of half-size paper tubes 152 is attached to the center of the panel section 151. The end-size large-diameter paper tubes 153 are attached to the left and right ends of the panel section 151 and are configured to cover the rear side panel section 150 and the left and right side panel sections 160 over a 270-degree range.

[0039] The top panel section 170, which forms the top surface of the container section 100 together with the aforementioned partial top panel section 144, consists of a panel section 171. The panel section 170 is also made of paper material such as honeycomb board, and its shape is rectangular. The two corners of the top panel section 170 on the rear side panel section 150 are provided with rounded edges (R) corresponding to the shape of the large-diameter end paper tube 153 provided on the rear side panel section 150.

[0040] Multiple protrusions 172 can be provided on the peripheral edge of the lower surface of the top panel 150, specifically in the portion that is fixed to the left and right side panels 160 and the rear side panel 150. These protrusions 172 contribute to the connection, positioning, and fixing of the top panel 170 to the left and right side panels 160 and the rear panel 150.

[0041] A connecting mechanism 173 is provided at the end of the front side panel section 140 of the top panel section 170. In this embodiment, three connecting mechanisms 173 are provided.

[0042] The connecting mechanism 173 can be of any type that enables the connection and disconnection of the front side panel section 140 with the top panel section 170 and the left and right side panel sections 160.

[0043] In the center of Figure 3, the refrigeration structure housed within the refrigerated container exterior structure, i.e., the refrigeration section 300, is shown. The refrigeration section 300 can be made of, for example, vacuum insulation material or a vacuum insulated panel. Figure 3 shows an example of the refrigeration section 300 being a hexahedron formed by vacuum insulated panels. In Figure 3, it can be seen that three layers of vacuum insulated panels are provided on the front and rear side panels. Although not visible in Figure 3, the refrigeration section 300 can also be provided in three layers each on the top panel 170, the left and right side panels 160, and the bottom panel 110.

[0044] [Paper tube / paper tube] Figure 4 shows one example of the creation of the aforementioned group of half-size paper tubes. As shown in this figure, the group of half-size paper tubes can be formed by cutting paper tubes in half along their diameter, arranging them parallel to each other, and attaching them to a honeycomb board by gluing or other means.

[0045] To attach paper tubes to a flat surface such as a honeycomb board, as shown in Figure 5, it is conceivable to provide a circular protrusion made of paper material on the flat paper material and to insert this protrusion into the end of the paper tube. In the example described above, it is conceivable that the protrusion provided for fixing the group of half-paper tubes to the bottom panel or top panel is formed as a semicircular protrusion in cross-section to match the shape of the group of half-paper tubes.

[0046] Figure 6 shows an example of a reinforcing structure provided within a paper tube structure. As shown in this figure, by providing semicircular nodes inside the paper tube, it is possible to significantly improve the strength of the paper tube.

[0047] [Display] Figure 7 shows another embodiment of the refrigerated container exterior structure. As shown in this figure, the refrigerated container exterior structure can have display sections 180 on the front side panel, left and right side panel, and rear panel. In this embodiment, the display section 180 is formed in a circular shape. It is of course possible to provide the display section 180 in other shapes. The display section 180 can display the contents being transported by the refrigerated container, the name and logo of the company handling the contents, and various other displays.

[0048] [Cooling section] Figure 8 shows an example of an embodiment having a refrigerated section 300 within the exterior structure of a refrigerated container. As shown in this embodiment, the refrigerated section can also be configured as a square-shaped structure in which the top, left and right side surfaces and the bottom surface form a so-called "square" shape in a cross-sectional or end-face view.

[0049] The square-shaped structure can be formed from multiple layers of vacuum insulation panels, as shown in Figures 8 and 9. In the implementation shown in Figures 8 and 9, it can be seen that six layers of vacuum insulation panels form the square-shaped structure.

[0050] As can be seen in Figures 8 and 9, the multiple layers of vacuum insulation panels forming a square-shaped structure can be configured as a combination of vacuum insulation panels formed in an L-shape in cross-sectional or end-face view. That is, the vacuum insulation panel can have a first surface and a second surface, and these first and second surfaces can be configured in a shape that is bent at a right angle.

[0051] In this case, the length L1 of the first surface and the length L2 of the second surface can be configured to be different in each of the six layers (Figures 8 and 9). That is, the vacuum insulation panel forming the innermost part of the square structure is constructed by combining four L-shaped vacuum insulation panels, each having a first surface of length L1 and a second surface of length L2. The vacuum insulation panel in the next layer is constructed by combining four L-shaped vacuum insulation panels, each having a first surface of length L1' and a second surface of length L2', where L1' can be configured to be a predetermined length longer than L1, and L2' can be configured to be a predetermined length shorter than L2. In this way, it is advantageous to configure all six layers so that L1, L1', ..., L1''''' are all different lengths, and L2, L2', ..., L2''''' are all different lengths (Figures 8 and 9).

[0052] Figure 9 shows another implementation of the refrigeration section housed in the exterior structure of a refrigerated container. In this implementation, in addition to the vacuum insulation panel structure described above, a heat storage material (Phase Change Material, PCM) is provided. Specifically, a flat plate-shaped heat storage material is arranged parallel to the inner circumference of the square-shaped structure formed by the vacuum insulation panel described above, and further, flat plate-shaped heat storage materials are arranged parallel to the front and rear side panel sections, forming a hexahedron structure with these six flat plate-shaped heat storage materials.

[0053] Furthermore, in the embodiment shown in Figure 9, it can be seen that flat heat storage material is provided parallel to each surface of the first U-shaped structure on the outer perimeter, on the top panel side and on the left and right side panel sides. In Figure 10, however, no heat storage material is provided on the outer perimeter of the bottom panel side of the first U-shaped structure.

[0054] In the implementation shown in Figure 9, it can be seen that a second U-shaped structure made of vacuum insulation material is provided on the outer periphery of the heat storage material that is provided on the outer periphery of the U-shaped vacuum insulation material. Furthermore, as can be seen in Figure 9, it is also possible to provide a space between the first U-shaped structure and the second U-shaped structure.

[0055] [Second implementation of the exterior structure of a refrigerated container] Figure 10 shows another embodiment of the refrigerated container exterior structure. This embodiment differs from the embodiments in Figures 1 to 3 in that, while the front side panel 140 of the container section 100 opens and closes, in this embodiment the top panel 370 of the container section 300 opens and closes.

[0056] As can be seen in Figure 10, in this implementation as well, the exterior structure of the refrigerated container consists of a container section 300 and a pallet section 400.

[0057] The pallet section 400, as can be seen particularly in Figure 12, consists of a bottom cross section 410, a support column section 420, and a top panel section 430. In the example shown in Figure 12, the bottom cross section 410 is formed from six elongated frame members that intersect each other. The frame members are formed in a roughly rectangular shape, and the corners are rounded to match the shape of the support column section. The frame members can be formed from paper material, particularly honeycomb board material.

[0058] The support columns 420 are formed from paper tube material. Paper tube material is a paper material component formed by winding and overlapping paper material to create a cylindrical shape. In forming the pallet section 400, multiple such paper tube materials are cut to a predetermined length and used as support columns 420, which are erected and fixed at the intersections of each component of the bottom cross section 410. The support columns 420 can be fixed to the bottom cross by adhesive or other methods, or by a method using protrusions as described later.

[0059] The top panel section 430 is placed on the support column section 420, which is erected on the bottom cross section 410 of the pallet section 400. The top panel section 430 can also be made from honeycomb board material or the like. The support column section 420 and the top panel section 430 can be fixed together by adhesive or other methods, or by a method using protrusions as described later. Figure 3 shows the bottom board member 331 of the container section 300 placed on the top panel section 430 of the pallet section 400.

[0060] As can be seen in Figures 10, 11, and 12, the container section 300 consists of a bottom panel section 310, a top panel section 370, and front, rear, left, and right side panel sections 340, 350, and 360. All of these panel sections are mainly made of paper and paper tube material.

[0061] As shown in Figure 12, the bottom panel portion 310 is formed by combining the top panel portion 320 of the pallet member 400, meaning that the top panel portion 430 of the pallet member 400 and the bottom panel portion 310 of the container portion 300 can be made from the same material. The bottom panel portion 310 is formed in a rectangular shape, and in this particular embodiment, it is formed in a substantially square shape. The corners of the bottom panel portion 310 are rounded, meaning that rounded corners are provided. The bottom panel portion 310 can be formed from a paper material such as honeycomb board material.

[0062] As can be seen in Figure 12, each of the four peripheral edges of the bottom panel section 310 is provided with multiple protrusions 320. These protrusions 320 are used for positioning when erecting the side panel sections 340, 350, and 360. These protrusions 320 can also be formed from paper material (Figure 5). The protrusions 320 can be formed in a semi-cylindrical shape to correspond to the shape of the semi-paper tube (described later) attached to the side panel section.

[0063] A bottom board member 330 is placed on top of the bottom panel 310. The bottom board member 330 can also be made from paper material, particularly honeycomb board material. The bottom board member 330 can be fixed to the bottom panel by adhesive or the like.

[0064] The side panel sections 340, 350, and 360 erected on the four periphery edges of the bottom panel section 310 consist of a front side panel section 340, a rear panel section 350, a left side panel section 360, and a right side panel section 360. All of these side panel sections 340, 350, and 360 are rectangular in shape. The side panel sections can also be formed from paper material, such as honeycomb board material.

[0065] The front side panel section 340 consists of a panel section 341 and a group of half-paper tubes 342.

[0066] The panel section 341 is formed from a flat paper material such as honeycomb board. In this embodiment, the panel section 341 is formed in a substantially square shape.

[0067] A group of half-sized paper tubes 342 is attached to the panel section 341. The group of half-sized paper tubes 342 is formed by cutting paper tube material in half along its diameter, orienting them vertically, and arranging them parallel to each other near the center of the front panel, and attaching them to the front side panel section. The half-sized paper tubes of the group of half-sized paper tubes extend from the top end to the bottom end of the panel section 341. Spaces where no paper tubes are attached are provided on both sides of the group of half-sized paper tubes on the panel section and between the paper tube groups.

[0068] The front side panel section 340 is provided with a connecting mechanism 343 for connecting to the top panel section 370. In this embodiment, three connecting mechanisms 343 are provided on the upper part of the front side panel section 340. Figure 12 shows that the paper tube group is not provided in the area of ​​the panel section 341 where the connecting mechanism is provided.

[0069] The side panel sections 360 provided on the left and right sides of the container section 300, i.e., the left and right side panel sections 360, consist of a panel section 361, a group of half-size paper tubes 362, and a large-diameter end paper tube 363. The panel section 361 is again formed from a flat paper material such as honeycomb board. Three connecting mechanisms 364 are attached to the ends of the left and right side panel sections 360 on the side of the top panel section. The group of half-size paper tubes 362 is attached to the panel section 361 in the same manner as described above, and again, the group of half-size paper tubes 362 is not provided in the area where the connecting mechanisms 364 are provided.

[0070] The rear side panel section 350, provided on the rear surface of the container section 300, is formed from a panel section 351 and a group of half-paper tubes 352. The group of half-paper tubes 352 is attached to the panel section 351 in the same manner as described above. In the rear side panel section 350, similar to the front side panel section 340, the group of half-paper tubes 352 is attached to the center of the panel section 351, except that the group of half-paper tubes is not provided in the area where the connecting mechanism 353 is provided.

[0071] The top panel section 370, which forms the top surface of the container section 300, consists of a panel section 371, a partial side panel section 372, a partial half-paper tube group 373, and a partial end large-diameter paper tube 375. The panel section 371 is also formed from a paper material such as honeycomb board, and its shape is rectangular. The four corners of the top panel section 371 are provided with rounded edges (R) corresponding to the shape of the partial end large-diameter paper tube 375.

[0072] The top panel 370 is further provided with a connecting mechanism 374 for connecting with the front and rear side panels 340, 350 and the left and right side panels 360. As a result, the top panel 370 is configured to be openable vertically, as shown in Figure 10.

[0073] The connecting mechanism 374 can be of any type that enables the connection and disconnection of the top panel section 370 with the front panel section 340, the rear panel section 350, and the left and right side panel sections 360.

[0074] [Third embodiment of the exterior structure of a refrigerated container] Figure 13 shows another embodiment of the refrigerated container exterior structure. In this embodiment as well, the refrigerated container exterior structure has a container section 500 and a pallet section 600. The embodiment shown in this figure differs from the embodiment in Figure 1 in that an impact-absorbing structure or buffer structure 546 is provided between the container section 500 and the pallet section 600, and on the large-diameter paper tubes at the four corners of the side panel section. The impact-absorbing structure provided on the large-diameter paper tubes at the ends is formed in a tubular shape that covers the large-diameter paper tubes at the ends.

[0075] In particular, as shown in Figure 15, nine shock-absorbing structures 640 are provided in this implementation between the upper panel 630 of the pallet section 600 and the bottom panel 510 of the container section 500.

[0076] Between the top panel portion 630 of the pallet portion 600 and the bottom panel portion 510 of the container portion 500 The shock-absorbing structures 640 provided in the pallet and the shock-absorbing structures provided in the large-diameter paper tubes at the ends can be made from a variety of materials available on the market. For example, rectangular parallelepiped pieces made from materials such as polyurethane vibration-damping material, low-rebound soft foam, foamed urethane elastomer, and chemically crosslinked closed-cell polyethylene foam can be installed and fixed on the position where the support columns of the pallet are located, as shown in Figure 15. These cushioning and shock-absorbing materials can be configured to be changed as appropriate depending on the contents being transported.

[0077] For example, Silomer (registered trademark) can be used as a polyurethane vibration damping material. Silomer has high shock absorption performance. Taking advantage of the properties of polyurethane foam, it effectively absorbs and disperses shock energy. It also has the characteristic of not easily degrading in performance even when subjected to repeated impacts. Unlike shock absorbers such as so-called D3O, it does not harden upon impact and always maintains its cushioning properties. Because it deforms and deteriorates little even with long-term use, it is suitable for applications where durability is required. It has the characteristic of easily maintaining its original shape even after repeated use. It is also soft and flexible, and its shape can be freely designed. It is excellent not only as a shock absorber but also as a cushioning material and vibration damping material. Because it has the property of absorbing not only shock but also vibration and sound, it is also suitable as a vibration damping material and noise reduction material for precision equipment. Since the hardness (density) of Silomer can be adjusted according to the application, it can be used for a wide range of applications, from soft cushioning to highly durable shock absorbers.

[0078] As a low-rebound soft foam, for example, Pitafoam (registered trademark) can be used. Pitafoam has high shock absorption performance, dispersing and absorbing energy when subjected to impact, reducing damage. It is resistant to deformation even after repeated impacts and can maintain its performance for a long period of time. It also has excellent vibration damping and sound insulation effects. Because it suppresses external vibrations and shocks, it can be used as a protective material or vibration damper for precision equipment. It also has a sound insulation effect, reducing the operating noise and vibration noise of machinery. Furthermore, it has anti-slip properties. It has a unique adhesiveness that makes it difficult to shift, so stability can be ensured simply by laying it down. By placing it under machinery or furniture, it contributes to both anti-slip and vibration absorption. Moreover, it has the characteristics of being flexible and easy to process. Because it can be freely cut, it can be processed into various shapes and sizes. It can be easily used by simply sticking or laying it down. Furthermore, it has high durability and is resistant to deterioration even with long-term use, making it suitable for repeated use. Its higher durability compared to general urethane foam is an advantage.

[0079] As a foamed polyurethane elastomer, for example, Cell Damper (registered trademark) can be used. Cell Damper is a material with high shock absorption performance. When subjected to impact, its cell (bubble) structure compresses and deforms, absorbing and dispersing energy. It is elastic and easily recovers to its original shape, so its performance does not deteriorate easily even with repeated use. It also has excellent vibration damping and vibration isolation effects. It suppresses external vibrations and improves the stability of machinery and buildings. It has the characteristic of maintaining performance even with long-term use. It is also highly durable. Its structure can withstand long-term use and repeated impacts. It is less affected by temperature changes and humidity and can be used indoors and outdoors. Furthermore, it is lightweight and easy to process. Due to its foamed structure, it can maintain strength while being lightweight. It is easy to cut and process, and can be adapted to various shapes. Furthermore, it has low rebound and high energy absorption properties. It has lower rebound force than general rubber and sponge, and has the characteristic of preventing the rebound of impacts. Because it "absorbs" impact, it is considered ideal for applications that suppress vibrations.

[0080] As a chemically cross-linked closed-cell polyethylene foam, for example, Sanpelka (registered trademark) can be used. Sanpelka has the characteristics of being lightweight and highly flexible. Due to its foamed structure, it is very lightweight and easy to handle. It is also flexible and easy to process. Furthermore, it has high cushioning and shock absorption performance. It has high cushioning and shock absorption properties. Its performance does not deteriorate easily even when subjected to repeated impacts. Moreover, it has excellent water resistance and chemical resistance. Because it does not absorb water easily (high water repellency), it can be used outdoors and in wet areas. It is resistant to chemicals and solvents and has characteristics of being resistant to corrosion and deterioration. It is also highly durable, resistant to ultraviolet rays and heat, and does not deteriorate easily even when used for a long period of time. Furthermore, it is an environmentally friendly polyolefin material and is recyclable. In addition, it has the characteristic of being easy to process and can be molded into any shape using a cutter or laser processing. It is also easy to bond, heat-seal, and cut.

[0081] By selecting these various materials according to the goods being transported, the transport route, the contents, and the intended use, and using them as cushioning material between the pallet and the container, or as cushioning material on the outer circumference of the large-diameter paper tube at the end, it becomes possible to transport and ship the contents more safely.

[0082] [Fourth embodiment of the exterior structure of a refrigerated container] Figure 16 shows yet another implementation of the exterior structure of a refrigerated container. In the implementations described so far, the bottom panel, left and right side panels, and rear side panel are glued together and fixed, and the front side panel can be connected and opened / closed by a connecting mechanism, or the bottom panel and front, rear, left and right side panels are glued together and fixed, and the top panel can be connected and opened / closed by a connecting mechanism. In this implementation, each panel is not glued to each other and is configured to be freely attached and detached and assembled, which is different from the above configurations.

[0083] Therefore, a second bottom panel section 840 is provided between the container section 800 and the pallet section 700, that is, between the bottom panel section of the container section 800 and the top panel section 830 of the pallet section 700. A band section 841 is configured to be attached to this second bottom panel section 840. In the embodiment shown in Figure 18, two sets of bands, one in the front-to-back direction and one in the left-to-right direction, are positioned along the bottom of the second bottom panel 840, then become exposed from the side and extend upward as shown in Figure 18.

[0084] It can be seen that each end of the band section 841 is provided with a connecting section 842 (for example, a buckle). Another band section extends from the top panel section 880 toward this band section 841 and extends downward from the top panel section, connecting with each other at the aforementioned connecting sections 842. Figure 16 shows how the side panel sections 850, 860, and 870 are fixed between the top panel section 880 and the second bottom panel section 840.

[0085] In the embodiment shown in Figure 18, a relief groove for the band portion described above can be formed in the upper panel portion 730 of the pallet portion 700 (Figure 18).

[0086] The side panel sections 850, 860, and 870 of the container section 800 can be implemented in the same manner as any of the embodiments described above, or are obvious to those skilled in the art from the above description and drawings, and therefore will not be described in detail here.

[0087] The top panel portion 880 is formed in a manner similar to that shown in Figure 12. The difference in the embodiment shown in Figure 18 is that, instead of a connecting mechanism that allows the top panel portion to be connected to and disconnected from the side panel portion, a connecting portion (such as a buckle) for connecting the band portion is provided.

[0088] The first bottom panel section, as shown in Figure 18, consists of a panel section, a partial side panel section, a partial half-paper tube group, and a partial end large-diameter paper tube. The panel section, the partial side panel section, the partial half-paper tube group, and the partial end large-diameter paper tube can each be bonded to one another in the manner shown in Figure 18.

[0089] As can be seen in Figure 18, the third panel section is placed on top of the first panel section.

[0090] [Fifth embodiment of the exterior structure of a refrigerated container] Figure 19 shows yet another implementation of the exterior structure of a refrigerated container. In this implementation, there are no panels on the side panels; instead, a group of paper tubes is configured to function as panels. For this reason, each paper tube has one slit at the top and one at the bottom, as shown in Figure 20. The slit positions can be, for example, offset by 180 degrees, as shown in Figure 20. This makes it possible to arrange and fix multiple paper tubes in parallel in a continuous manner (Figure 20).

[0091] By using such a group of paper tubes as the side panels, and providing larger diameter end paper tubes at each corner of the side panels, it becomes possible to realize the exterior structure of a refrigerated container without using panel boards (honeycomb boards) or the like for the side panels.

[0092] Figure 21 shows an embodiment with another configuration for constructing a group of paper tubes. In this embodiment, each paper tube has four slits at the top and bottom, with the angles of each slit alternating by 90 degrees. For example, slits can be provided at the 3 o'clock, 6 o'clock, 9 o'clock, and 12 o'clock positions on the top and bottom of the paper tubes, and a group of paper tubes can be formed by engaging two of these slits together.

[0093] [Paper tube internal structure] Various materials can be inserted and sealed inside the aforementioned half-size paper tubes and paper tubes. For example, shock-absorbing materials can be inserted and sealed inside the half-size paper tubes and paper tubes. For example, D3O (registered trademark) can be used as a shock-absorbing material.

[0094] D3O has the characteristic of being flexible at room temperature and hardening upon impact. In other words, D3O is a soft, pliable material that can freely change shape under normal conditions, but when impact is applied, its molecules instantly bond together, hardening and absorbing and dispersing energy. After the impact is removed, it returns to its soft state, exhibiting the properties of a "non-Newtonian fluid."

[0095] Furthermore, D3O is lightweight and comfortable. That is, despite its high shock absorption capacity, its light weight makes it easy to transport even when incorporated into paper tube or semi-paper tube groups.

[0096] Furthermore, D3O possesses high energy absorption capabilities. D3O has a higher impact absorption capacity than typical foam materials, and is particularly effective in situations where repeated impacts occur.

[0097] Furthermore, D3O offers both durability and flexibility. It is resistant to deterioration even after long-term use, and can maintain its elasticity.

[0098] It is conceivable to insert and enclose, for example, aerogel inside the semi-paper tube or paper tube groups. Aerogel is known as the lightest solid in the world and is a material with extremely high thermal insulation and shock absorption capabilities. Aerogel is composed of more than 90% air and is extremely lightweight. For example, silica aerogel has a mass of approximately 3 mg per cm³ (compared to 0.001 to 0.2 g / cm³ for standard aerogel). While it is translucent, very brittle, and has a foamy texture, it possesses excellent thermal insulation properties. For example, its thermal conductivity is 0.013 to 0.030 W / m·K, which is considerably lower than that of typical insulation materials. It is effective even in extremely cold environments, and by inserting and enclosing it inside the semi-paper tube or paper tube groups used in the exterior structure of refrigerated containers, it is possible to obtain an extremely high thermal insulation effect.

[0099] Furthermore, it possesses excellent shock absorption properties; its nano-level fine structure diffuses impact and absorbs energy. Although aerogel is not as flexible as D3O mentioned above, it has high shock absorption capabilities.

[0100] Furthermore, it boasts high fire and heat resistance. For example, it is said to withstand temperatures exceeding 1,000°C. In addition, it has high water-repellent and water-absorbing properties. For instance, hydrophobic aerogel repels water and can be used as a waterproof insulation material. Hydrophilic aerogel absorbs moisture and water and can be used as a desiccant. By inserting and sealing it into the aforementioned semi-circular paper tubes and paper tubes, it becomes possible to protect contents that require fire and water resistance.

[0101] [Sixth embodiment of the exterior structure of a refrigerated container] In the examples described above, we explained cases where all the paper tubes were so-called round paper tubes. Of course, it is also possible to use square paper tubes in addition to round paper tubes (Figure 22). When using square paper tubes, in the places where the group of half-paper tubes made from cut round paper tubes was used in the first to fifth embodiments, it is possible to use a group of half-paper tubes made from cut square paper tubes, or to use them as a group of paper tubes without cutting. In places where round paper tubes were used as end paper tubes, it is possible to use square paper tubes as end paper tubes. Furthermore, it is also possible to use square paper tubes for the support columns used in the pallet section. In this way, by using square paper tubes instead of round paper tubes, it is possible to achieve the same configuration as in the first to fifth embodiments, such as making the front and side panels openable (first embodiment), making the top panel openable (second embodiment), including a cushioning structure (third embodiment), making it an assemblyable structure (fourth embodiment), and constructing the side panel section from square paper tubes alone.

[0102] [Another example of a buffer structure] Figure 23 shows another embodiment of the cushioning structure. In the embodiments shown in Figures 13 to 15, the cushioning material was placed between the container section and the pallet section, whereas in the structure shown in Figure 23, the cushioning material is placed on the bottom panel of the container section, and a vibration-damping plate is placed on top of that. The vibration-damping plate can basically be made of a paper board, such as a honeycomb board. It is also possible to consider using a board made of other vibration-damping materials. Such a structure can be adopted in the first to sixth embodiments as well, and is advantageous. Figure 24 is a perspective view of such a vibration-damping structure from above. In this embodiment as well, the cushioning material can be placed above the area where the support columns of the pallet section are provided.

Claims

1. A refrigerated container exterior structure consisting of a container section and a pallet section, with paper as the main material, The container section consists of a bottom panel, front side panels, left and right side panels, rear side panels, and a top panel. The front side panel, left and right side panel, and rear side panel are fitted with a group of paper tubes consisting of multiple paper tubes, or a group of half-paper tubes consisting of multiple half-paper tubes obtained by cutting a paper tube in the extending direction, and A refrigerated container exterior structure characterized by the fact that the corners between the front side panel, left and right side panel, and rear side panel are covered with end paper tubes.

2. The refrigerated container exterior structure according to claim 1, characterized in that the end paper tubes are made of paper tubes that are larger in size than the paper tubes that make up the group of paper tubes or the group of half-paper tubes.

3. The exterior structure of a refrigerated container according to claim 1, characterized in that a connecting mechanism is provided between the front side panel and the left and right side panels, and between the top panel and the front side panel, which allows for the connection and disconnection of these panels, and the front side panel is configured to be openable.

4. The exterior structure of a refrigerated container according to claim 1, characterized in that a connecting mechanism is provided between the top panel and the front side panels, left and right side panels, and the rear side panels, which allows for the connection and disconnection of these panels, and the top panel is configured to be openable.

5. The top panel and bottom panel are provided with band sections and corresponding connecting sections, and the front side panels, left and right side panels, and rear side panels are configured to be held in place by the tension of the bands stretched between the top panel and the bottom panel tubes. A connecting mechanism is provided between the front side panel, left and right side panels, and rear side panel, which allows for the connection and disconnection of these panels, and The exterior structure of a refrigerated container according to claim 1, characterized in that each panel is configured to be detachable by releasing the connection between the band portion and the connecting portion.

6. A refrigerated container exterior structure consisting of a container section and a pallet section, with paper as the main material, The container section consists of a bottom panel, front side panels, left and right side panels, rear side panels, and a top panel. The front side panel section, left and right side panel section, and rear side panel section are constructed primarily from paper tubes, and A refrigerated container exterior structure characterized by the fact that the corners between the front side panel, left and right side panel, and rear side panel are covered with end paper tubes.

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